Pyrenediones (PYDs) are efficient photocatalysts for three oxygenation reactions: epoxidation of electron deficient olefins, oxidative hydroxylation of organoborons, and oxidation of sulfides via in situgeneration of H2O2 under visible light irradiation, using oxygen as a terminal oxidant and IPA as a solvent and a hydrogen donor.
吡咯二酮(PYDs)是用于三种氧化反应的有效光催化剂:缺电子烯烃的环氧化,有机硼的氧化羟基化以及在可见光照射下通过原位生成H 2 O 2,使用氧作为末端氧化剂和IPA作为硫化物的氧化溶剂和氢供体。
Photochemical and Electrochemical Oxidation Reactions of Surface-Bound Polycyclic Aromatic Hydrocarbons
作者:Maciej Mazur、G. J. Blanchard
DOI:10.1021/jp037393j
日期:2004.1.1
We have studied the oxidation reactions of two polycyclic aromatichydrocarbons (PAHs), pyrene and anthracene, attached covalently to silica, indium-doped tin oxide (ITO), and gold surfaces. Attachment of the PAHs to the substrates was accomplished by established covalent coupling methods. For both pyrene and anthracene, we find that electrochemical and photochemical oxidation produces first a monohydroxy-PAH
Upon irradiation with visible light the environmental pollutants 1,6-, 1,8- and 4,5-pyrenedione are reduced to the corresponding dihydroxypyrenes, while 4,5-pyrenedione undergoes photoadditionreactions with alkenes and sulfur dioxide.
Photochemistry of Pyrene on Unactivated and Activated Silica Surfaces
作者:Celso A. Reyes、Myriam Medina、Carlos Crespo-Hernandez、Mayra Z. Cedeno、Rafael Arce、Osvaldo Rosario、Daniel M. Steffenson、Ilia N. Ivanov、Michael E. Sigman、Reza Dabestani
DOI:10.1021/es9905391
日期:2000.2.1
higher surface coverages (2 × 10-5 mol/g). When photolysis is carried out at 5 × 10-5 mol/g pyrene, photodegradation rate drops sharply and pyrene loss becomes insignificant. No significant change in the product distribution is observed when the photolysis is carried out on unactivated or activated silica. Photodegradation rate is slightly faster on activated silica compared to unactivated silica. Mechanistic